Python Set issubset() Method

The Python set issubset() method returns True if all elements of a set are present in another set, and False otherwise. It can also be written using the <= operator.

The syntax of the issubset() method is:

set.issubset(set2)
# or
set1 <= set2

Python set issubset() Parameters

The issubset() method takes one parameter:

• set2: Another set or iterable to check if the original set is its subset.

Here are examples demonstrating the issubset() method:

# Example 1: Basic subset check
set1 = {1, 2}
set2 = {1, 2, 3, 4, 5}
result = set1.issubset(set2)
print(result)  # Output: True

# Example 2: Using operator syntax
numbers1 = {1, 2, 3}
numbers2 = {1, 2}
result = numbers2 <= numbers1
print(result)  # Output: True

# Example 3: Equal sets are subsets
set1 = {1, 2, 3}
set2 = {1, 2, 3}
result = set1.issubset(set2)
print(result)  # Output: True

The issubset() method is useful for checking if one set is contained within another.